Bests & Worsts Reviews from Amazon

Bought as sleep tracker only yet MOST of that functionality won't be available until 'sometime 2021' - but don't look for that info on amazon's product page or even the company's website. Incompatible with CPAP machine headgear (again no notice anywhere). Very poor battery performance - barely overnight if that. The worst issue? You have to keep your phone on ALL NIGHT LONG since their software is so poor their app can't run in the background! You won't find that info anywhere until after your purchase. They expect you to own very expensive bluetooth ear pods (didn't see that in their marketing info). With my phone and plugged in earphones I can't charge my phone overnight and use this product simultaneously. So you have to fully charge their headband and your phone before you go to sleep then you have to recharge your phone as soon as you get up so it works during the day. Absolutely terrible design and yet their slick marketing never tells you the reality. If I could rate this product negatively I would. A minus 5 sounds about right.